[veles2008]

Мне кажется вы имели ввиду так!

<?xml version="1.0"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">
 
    <mx:Script>
        <![CDATA[
 
        import mx.collections.ArrayCollection;
 
        [Bindable]
        private var medalsAC:ArrayCollection = new ArrayCollection( [
            { YEAR: "1996", Jan:177, Feb:391, Mar:751 },
            { YEAR: "1997", Jan:177, Feb:391, Mar:751 },
            { YEAR: "1998", Jan:177, Feb:391, Mar:751 } ]);
        ]]>
    </mx:Script>
 
    <mx:Panel height="100%" width="100%" layout="horizontal">
 
 
 
         <mx:BarChart id="bar" height="100%" width="45%" 
            paddingLeft="5" paddingRight="5" 
            showDataTips="true" dataProvider="{medalsAC}">
 
            <mx:verticalAxis>
                <mx:CategoryAxis categoryField="YEAR"/>
            </mx:verticalAxis>
 
            <mx:series>
                <mx:BarSeries yField="YEAR" xField="Jan" displayName="Jan"/>
                <mx:BarSeries yField="YEAR" xField="Feb" displayName="Feb"/>
                <mx:BarSeries yField="YEAR" xField="Mar" displayName="Mar"/>
            </mx:series>
        </mx:BarChart>
 
 
    </mx:Panel>
</mx:Application>